问题
填空题
计算(2
|
答案
(2
+3
)(26
-3
)+6
-23
+23
=(2
)2-(3
)2+6 (
-2)(3
-2)3 (
+2)(3
-2)3
=12-6+(
-2)23 -1
=6-[(
)2-43
+22]3
=6-3+4
-43
=4
-1.3
计算(2
|
(2
+3
)(26
-3
)+6
-23
+23
=(2
)2-(3
)2+6 (
-2)(3
-2)3 (
+2)(3
-2)3
=12-6+(
-2)23 -1
=6-[(
)2-43
+22]3
=6-3+4
-43
=4
-1.3